Math Is Fun Forum

paulson

Member

Registered: 2008-02-28

Posts: 2

i need help

we are 90 member group , we want to select committee of 5 member each without a member belonging to  more than 1 committe (without repetation of a member)take 1----90 as member names. pls  can any one help us with how many committe that could be formed and what are the possible combinations of members
thanks

Last edited by paulson (2008-02-28 08:38:33)

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: i need help

You mean how many ways you can select 18 committees, each committee consisting of 5 members and no member belonging to more than one committee?

I think it’s

.                           .